paperclip 4 and ruby on rails 4 problems -

i'm learning rails4 , want create album management app

i choose paperclip this.

but failed upload image , me?

photo controller - upload method receive post upload_test method

class photoscontroller < applicationcontroller   before_action :set_photo, only: [:show, :edit, :update, :destroy]    # /photos   # /photos.json   def index     @photos = photo.all   end    # /photos/1   # /photos/1.json   def show   end    # /photos/new   def new     @photo = photo.create   end    # /photos/1/edit   def edit   end    def upload     @photo = photo.create(photo_params)     @photo.album_id = params[:album_id]     @photo.avatar = params[:avatar]      if @photo.save       render text: "1"     else       render text: "0"     end   end    def upload_test     @photo = photo.create   end    # post /photos   # post /photos.json   def create     @photo = photo.create(photo_params)      respond_to |format|       if @photo.save         format.html { redirect_to @photo, notice: 'photo created.' }         format.json { render action: 'show', status: :created, location: @photo }       else         format.html { render action: 'new' }         format.json { render json: @photo.errors, status: :unprocessable_entity }       end     end   end    # patch/put /photos/1   # patch/put /photos/1.json   def update     respond_to |format|       if @photo.create(photo_params)         format.html { redirect_to @photo, notice: 'photo updated.' }         format.json { head :no_content }       else         format.html { render action: 'edit' }         format.json { render json: @photo.errors, status: :unprocessable_entity }       end     end   end    # delete /photos/1   # delete /photos/1.json   def destroy     @photo.destroy     respond_to |format|       format.html { redirect_to photos_url }       format.json { head :no_content }     end   end    private     # use callbacks share common setup or constraints between actions.     def set_photo       @photo = photo.find(params[:id])     end      # never trust parameters scary internet, allow white list through.     def photo_params       #params.permit(:avatar)     end end 

view : upload_test.html.erb

<%= form_tag("/photos/upload", method: "post" ,  multipart: true) %>   <%= text_field_tag :album_id %>   <%= file_field_tag :avatar %>   <%= submit_tag("save") %> <% end %> 

model :

class photo < activerecord::base   has_attached_file :avatar, :styles => { :medium => "300x300>", :thumb => "100x100>" }, :default_url => "/images/:style/missing.png"   validates_attachment_content_type :avatar, :content_type => /\aimage\/.*\z/ end 

and development.rb

h

air::application.configure   # settings specified here take precedence on in config/application.rb.    # in development environment application's code reloaded on   # every request. slows down response time perfect development   # since don't have restart web server when make code changes.   config.cache_classes = false    # not eager load code on boot.   config.eager_load = false    # show full error reports , disable caching.   config.consider_all_requests_local       = true   config.action_controller.perform_caching = false    # don't care if mailer can't send.   config.action_mailer.raise_delivery_errors = false    # print deprecation notices rails logger.   config.active_support.deprecation = :log    # raise error on page load if there pending migrations   config.active_record.migration_error = :page_load    # debug mode disables concatenation , preprocessing of assets.   # option may cause significant delays in view rendering large   # number of complex assets.   config.assets.debug = true    paperclip.options[:command_path] = 'c:\program files\imagemagick-6.8.8-q8' end 

post params got :

parameters: {"utf8"=>"✓", "authenticity_token"=>"02rmntojfa92jh1iho9umupyhxnyg99m8r8scky9nhy=", "album_id"=>"1", "avatar"=>#<actiondispatch::http::uploadedfile:0x228fdc8 @tempfile=#<file:c:/users/casper~1.hua/appdata/local/temp/rackmultipart20140206-8076-1hqif1h>, @original_filename="_mg_0059.jpg", @content_type="image/jpeg", @headers="content-disposition: form-data; name=\"avatar\"; filename=\"_mg_0059.jpg\"\r\ncontent-type: image/jpeg\r\n">, "commit"=>"save"} 

you'll need amend these areas:

---

strong params

#app/controllers/photos_controller.rb def photo_params    params.require(:photo).permit(:avatar) end 

---

new / create actions

  #app/controllers/photos_controller.rb   def new     @photo = photo.new   end    def new     @photo = photo.new(photo_params)      if @photo.save       render text: "1"     else       render text: "0"     end   end    private    def photo_params       params.require(:photo).permit(:avatar)   end